Demountable time switch unit for universal use



May 23, 1950 R. D. SMITH 2,508,896

DEMOUNTABLE TIME SWITCH UNIT FOR UNIVERSAL USE INI/fNToR May 23, 1950 R.D. SMITH 2,508,896

' DEMOUNTABLE TIME swITcE UNIT EOE UNIVERSAL UsE Filed June 20, 1945 5Sheets-Sheet 2 j 60 /2/ /9l 0l/23 J9 //7 /ef LIIIHIII IN VEN TOR May 23,1950 R. D. SMITH 2,508,896

DEMOUNTABLE TIME SWITCH UNIT FOR UNIVERSAL USE Filed June 20, 1945 3Sheets-Sheet 3 INVENTOR Patented.- May 23, .11950 Y .l

UNITED STATES PATENT oEEicE DEMOUNTABLE TIME SWITCH UNIT FOR UNIVERSALUSE Raymond D. Smith, Easton, Conn.

Application June 20, 1945, Serial No. 600,557

25 Claims. 1

'I'his invention relates to time switches combined with r incorporatedwithin a time-of-day telling clock and particularly to electriccircuitmaking-and-breaking mechanism operated or governed by clockwork.

Time switches of this type commonly consist of a, time giving mechanismor time movement mechanically so associated with circuit switchingelectric contacts that such contacts are caused automatically to makeand break one or more electric circuits at preset times of day. In suchtime switches where the same clock-work not only operates or governs anelectric switch but also drives conventional clock hands in front of aconventional clock face for telling time of day, it has been proposed inmy former U. S. Patents Nos. 2,004,137 and 2,032,774 to provide separateindicators adjustably settable around the circularly arranged regulartime-of-day markings on the clock face for registering thereby the timeof day at which the circuit making and breaking actions automaticallywill take place. Mechanically, such indicators may be connected with theswitch operating mechanism so as to assume registering positions withrespect to the clock face indicia that shall accord accurately with thesetting of. inside trips or any other kind of working elements whichdetermine at what point in the running of the clock movement theautomatic electric switch actions shall be caused to take place.

The present invention aims to incorporate such distinctive kind ofswitch action, time indicator means as are proposed in my former saidpatents in a novelly organized form of appliance that may becharacterized as a demountable armored unit having distinct andimportant advantages over previously known kinds of time switches. Thisnovel structural form of combined clock and time switch unit opens theway to radical departure from long established but costly andinefficient practices of manufacturing and merchandizing time switchesfor many elds of use. Examples of such use are: the time control ofcooking in electric and gas ranges; timed automatic turnon and turn-offof radio receiving sets for catching desired broadcasting programs; theautomatic shifting of temperature setting in house heating controls atregular preset' times between lowered night heat and normal daytimeheat; the timed automatic defrosting of electric refrigerators on aregular daily schedule; the automatic turning on and off of store windowdisplay lights, bill board' and outdoor advertising lights, as well asthe illumination of public quarters automatically at preset times of dayor night.

'Ihe present improvements aim to solve these former problems byproviding a small, unitary, armor-encased time switch incorporating atimeof-day telling clock with its crystal protected clock face, whichshall be attachable in readily demountable manner in iiush relation to asight apertured panel or other form of upright support wall.

Other objects oi' the present invention have to do with structural andfunctional improvements in an organization of working parts based onprinciples originating in my aforesaid issued patents. Among such aredevices that permit back-setting as well as forward setting of certainelectric switch time setting controls and indicators; devices whichchange the program of automatic circuit switching action irom a twelvehour cycle to a twenty-four hour cycle, controls additional to theelectric switch setting controls exposed for manipulation at the frontof the unit for actuating the clock-work as for restarting a non-selfstarting synchronous clock motor when its interrupted supply of currentis resumed or resetting the clock hands to a correct time of day,devices to stay the time setting indicators and controls againstunintentional displacement from their set positions, and devices toenable a timeswitch of the character concerned to switch currentautomatically from one circuit to another.

The foregoing and other objects of the invention are more fully referredto in the following description of a preferred embodiment of theinvention in which description reference is had to the appended drawingswherein:

Fig. 1 is a front view oi' mv improved clock switch unit mounted on avertical panel, a part of which is shown as broken awav to expose moreof the unit than in practice would appear.

Fig, 2 is a view looking from the right at Fig. 1, some of the partsbeing shown as taken in section on the planes 2--2 in Fig. l, adifferent thickness of support panel being indicated at the top than isindicated at the bottom for purposes oi' illustration.

Fig. 3 shows a useful application oi' the unit of Figs. 1 and 2, whereinthe same is mounted against the inner face of a hinged cover givingaccess to a cabinet containing a magnetically operated switch, in theupper part of which cabinet there is room to accommodate the clockswitch unit when the cover of the cabinet is swung closed. IieXibleelectric wires connecting the clock switch unit and themagnetic switchwhile permitting the cabinet cover to be opened and closed.

Fig. 4 shows a portion of the mechanism in Fig. 2 drawn on a largerscale more clearly to illustrate modified details of construction.

Fig. 5 shows on a scale similar to Fig. 4 a still further modificationof gearingv construction for changing the ratio through which thecircuit controller is rotated.

Fig. 6. on a correspondingly enlarged scale, shows a modification of thetime setting manual of Fig. 2 whereby this manual becomes selfbraked toremain stationary without being hold while the other manual is beingadjusted. Fig. 6 further shows separately movable handles on concentricspindles for independently actuating the switch mechanism and theclockwork.

Fig. 'l is a partial view of the clock motor as viewed from the leftlooking at Fig. 1 with the cover oi' the unit shown in section andserving to mount an agitating mechanism for starting in motion the clockmovement.

Fig. 8 is a rear view of the agitating mechanism of Fig. '7 as sameappears when looking from the left at Fig. '7.

Fig. 9 is a front view oi a modied construction of the clock switch unitwherein the clock face and hands are only fragmentally shown and thetime setting discs of the switch are modified and cut away to indicatetheir interleaved relationship.

Fig. l0 is a view of the modified construction taken in section onplanes III- I0 in Fig. 9 looking in the direction o1 the arrows.

Fig. 11 is a detail view in perspective showing one of the circuitcontrolling discs.

Fig. 12 is a similar view showing the other circuit controlling disc.

Fig. 13 is a similar view of an insulative facing for the disc of Fig.1l.

Fig. 14 correspondingly shows an insulative facing for the disc oi' Fig.12.

Fig. 15 is a sectional fragmentary View taken on the plane I5-I 5 inFig. 9 to show the relationship of the interleaved discs of Figs. 11 to14, inclusive, at their point of circuit switching action.

Fig. 16 is a view similar to Fig. 15 taken on the plane Ill-I6 in Fig. 9showing the relationship of the discs at their other point of circuitswitching action.

For the purposes of constructing my improved clock switch as aself-contained, unitary device, I provide a framework including apartition or main frame plate III having a large circular aperturethrough which, and beyond both faces of which. extends a diametricallylarge thinwalled hanged bearing eyelet II. A ring gear I2 is retained byone flange of this large bearing eyelet against the front surface offrame plate III, and a similar ring gear I3 is retained by the otherflange oi' the same eyelet against the rear face of frame plate Il).Ring gears I2 and I3 are thus supported for independent rotation onopposite sides of the frame plate I0. There will occur to those skilledin the art obvious equivalents for this particular construction whichwill permit gears I2 and I3 to be correspondingly disposed andoperative.

I may construct a support means for the switch and time tellingr partsin the form of a base plate slab I4 of insulative material firmlyattached to and spaced rearward from frame plate I0 by the supportbrackets I5. Bearing structure which helps to support the circuitswitching and time telling parts may include a tubular rigid bushing I6threaded at its rear end to receive a front clamp nut I1 and a rearclamp nut I8 which nuts 4 when set up against the respectively oppositesides ofbase plate I4 serve to hold the bushing IS in rigidperpendicular relation thereto and projecting forward therefromconcentrically with the ring gears I2 and I3 asbest shown in Fig. 4.

Members fixedly carried by the stationary bushing I6, in their orderfrom back to front, comprise as also clearly shown in Fig. 4, a largethin insulative washer I9, the insulative collar 20, another largeinsulative washer 2 I, and a third clamp nut 22 having threadedengagement with the forward end of bushing I6 and serving to thrust thewashers I8 and 2|, together with the insulative collar 20 axiallybackward and tighten them fixedly against the clamp nut I1 so that all.these parts are in effect made rigid with the. bearing bushing I6.Further parts iixedly supported upon the bushing I6 comprise theinternally threaded, insulative collar 23 which has threaded engagementwith the front end of bushing IE and projects forward from the front endthereof and at its own front end receives and insulates from electricalcontact with bushing I6 a retaining screw 24 the enlarged head of whichclamps a clock face dial 25, backed by an insulative facing 26, againstthe forward end of insulative collar 23 whereby the clock dial issupported -concentrically with the ring gears I2 and I3.

Dial 25 is representative of any circuitousscale of time-of-day markingsstationed in relation to frame plate I0. The retaining screw 24 may berecessed as shown in Fig. 4 to reduce the axial length of its centralhole that serves as a steadying bearing for the rotary spindles for theclock hands later to be described.

The prime mover of my improved assembly of clockwork may incorporate anykind of spring driven movement or electrically powered reduction geartrain capable of running at a constant speed for time keeping purposes.The movement herein shown includes an electric motor1 preferably of thesynchronous type, that is inherently capable of keeping in step with thetime characteristics of an alternating current. One example of this typeof motor is disclosed in United States Patent No. 1,864,108. The onlydescription thereof necessary to be given herein is that its frameworkmay comprise a front frame plate 21 mounted on, and spaced from, baseplate I4 by posts |61 together with an intermediate plate 28 connectedin spaced relation to plate' 21 by posts 29, and a rear plate 30connected to and spaced from intermediate plate 28 by posts 3|. The rearframe plate 30 of the time giving train or movement may be formed andmade of material suitable to constitute the magnetic or field stator formotor armature 32, iield stator plate 20 being energized for thispurpose by an alternating current coil 33 wound about a laminated bar34, magnetically contacting said plate. A train of reduction gears mayprovide operating connection between the armature pinion 35 and anotherpinion 36 fast to the spindle 31 that extends through the stationarybushing I6 and at the front end thereof carries a clock hand 38swingable about an axis transversely of which frame plate I0 extends.The same spindle 31 may extend rearward from pinion 36 through themovement plates 28 and 30 to be manually turned for setting the clockhand by means of a button which may detachably engage a squared terminusof spindle 31 and itself be rotatably mounted in the rear wall of therear section 46 of the casing structure.

In some constructions of the clock switch unit I prefer so to arrangethe movement gearing that spindle 31 and hand 38 shall rotate at a speedof one revolution in one hour thus to serve as the socalled "minute handof-an ordinary clock. In other constructions I prefer to arrange themovement train to impel directly a pinion 39 fast to the spindle 40 andextending through spindle 31 (made hollow for this purpose) to carry atits forward end the sweep hand 4|, which parts are shown in broken linesin Figs. 1 and 4. Spindle 40 and hand 4| may then be driven at a speed fone revolution in one minute to serve as the so-called second hand of anordinary clock and, by its greater and therefore visible speed, toinform an observer whether the clock is running or has stopped. In thecase of using spindle 40 and hand 4|, pinion 36 may derive its movementby being fixed to minute spindle 31, the latter carrying gear 42 alsollxed thereto and impelled from pinion 39 by the reducing idler gears 43and 44 whose common spindle 44 is of course rotatably supported inbearing plates 21 and 28 of the clock movement.

Whether or not the sweep hand 4|, its spindle 40 and the gears 42, 43and 44 are employed, the "minute" spindle 31 may be surrounded by theusual hollow spindle 41 carrying the hour hand 48 between the minutehand 38 and the clock dial 25. Hollow spindle 41 will be rotated at theusual speed of one revolution in twelve hours by means of the gear 49iixed on its rear end because gear 49 is driven from pinion 36 in theratio of 1 to 12 by' the idler reduction gears 50, 5|, the former ofwhich is at the front of movement plate 21 while the latter is at therear of said movement plate, both of said idler gears 50 and 5| beingilxed to turn in unison on a common spindle not shown but projectingthrough and having bearing in the movement 4plate 21. As the hourspindle 41 is given rotary bearing support in the screw 24 and as theminute spindle 31 is given rotary bearing in the movement plate 21, andas spindles 41 and 31 (as well as 40 when used) rotate in telescopedrelationship, it will be plain that they are adequately supported forfree rotation at their respectively different speeds without tendency tobind even if variations occur in the assembled relationship of thestationary sup-k porting parts extending between the bearing screw 24and the movement plate 21.

The clock controlled circuit maker and breaker of my improvedconstruction is similar in nature to that disclosed in my aforesaid U.S. Patent No. 2,004,137 and includes a current distributor in the formof helically disposed contact wiper 52, preferably of resilientconductive material, ilxed to rotate in unison with a metallic hub 53 towhich is also xeclY the gear 54 preferably made of insulative material.Hub 53 is freely rotatable about the stationary insulative collar 2lbetween the insulative washers |9 and 2| and contains a peripheralgroove 55 constantly contacted conductively by the resilient currentcarrying brush I mounted on the insulative base I4 by screw 51.

The contact wiper 52 is thereby constantly supplied with current throughthe brush 56 while rotatively impelled by suitable transmission gearingdriving the insulative gear 54 and driven by the time movement, or anypart motivated thereby, in a manner to travel in unison with some one ofthe three clock hands 33, 3| or 43,' or at some predetermined speedratio in relation thereto. For convenience of illustration I havenot'shown the contact wiper gear 54 as driven from the time movementthrough a train separate from that peripheral edge of each which impelsthe time telling clock hands but inthereon and I have shown an idlergear 55 inv mesh with the insulative contact wiper driving gear 54 atthe front of the switch base |4 and connected to turn in unison with theidler gear 56 at the rear of said base which gear 60 is in mesh withgear 56. Thus the contact wiper 52 may be rotated, say, pinions 59 and60 are equal to each other in diameter and gears 54 and 58 are equal toeach other in diameter, or, if preferred, at half the speed thereof, aswould be the case with the relative sizes oi' gears 54. 59, 60 and 55.that are shown in Fig. 4.

The means which determine the time at which a circuit shall be made orbroken by the clock impelled contact wiper 52 include switch actioncontrolling elements in the form of interleaved and relativelyadjustable discs or rings for the most part similar to those describedin detail in my aforesaid Patent No. 2,004,137 wherein a. split disc 6|of conductive material is interslideably adjustable in helicallyinterleaved relationship to a split disc 62 of insulative material, bothoi these discs being carried upon a central hub 63 which may comprise athin walled bearing eyelet between whose rear head and said discs isassembled a cupped spring washer 64 to insure good electricalconductance between disc 6| and hub 63. The two discs 6| and 62 withtheir hub 63 thereby comprise a unitary rotatable structure adjustablyturnable about the insulative collar 23 back of the clock dial 25 andinsulated therefrom by the facing 26. Suitable disc stationing frictionis imparted to the discs 6| and 62 by their mutually acting broadsidepressure against each other aided by the spring 65 which exerts anaxially expansive thrust between the disc hub 63 and the clamp nut 22heretofore described. Spring 65 is thus part of the means of electricalcontact between the conductive disc 6| and a binding post 66 secured tothe switch base |4 by a screw 61 which is placed in electricalconnection with the clamp nut |1 by a radial conductive strap or bussbar 68 clamped between nut |1 and the base plate I4.

All parts have now been described which enable the contacting with, andseparation from, switch action controlling elements 6| and 62 of wiper52 respectively to make and break a circuit extending from the lead-inwire 69 to the lead-out wire 10 through the following conductive parts:strap 68, nut I1, bushing |6, nut` 22, spring 55. hub 63, washer 64,conductive disc 6|-wiper 52, hub 53, brush 56, and screw 51, all of theabove conductive parts being separated from all other metallic parts ofthe mechanism or frame by parts composed of insulation as hereinbeforedescribed.

In my U. S. Patent No. 2,004,137 means for engaging the discs 6| and 62for shifting their relative rotative adjustment as well as theirabsolute rotary positions are provided consisting of axially disposedinsulative projections or studs attached respectively to the discs. Fig.2 herein (as well as Figs. 11 and 12) show a construction of these discswherein no propelling stud or the like is attached thereto but whereinthe material of the discs themselves is extended at suitable points toproject in suitable directions from the disc to be engaged by suitablepropelling shoulders carried by ring gears I2 and I3, respectively, formanually effecting selective rotative adjustments oi each disc while inunison with the hour hand 4l ifthe conductive disc 8l is thus precludedfrom conductive contact with any metallic parts of the unit 'other thanthose designed to complete an electric circuit as herelnbeioredescribed.

The radial projection 1I extending from the peripheral edge ofinsulative disc 82 contains an opening which may be engaged by aforwardly extending pin 12 carried by the front ring gear I2 whereby pin12 can propel insulative disc 62 in either rotary direction, while thebackward extension 13 oi a tongue-like continuation of the sheetmaterial of conductive disc 8| occupies a notch in an lnsulativeimpelling lug 14 carried by the rear ring gear I3 whereby lug 14 canpropel the conductive disc 6I in either rotary direction. The turning ofeach of discs 62 and 8| relative to the other, as adjusted respectivelyby the turning ofring gears |2 and I3, is preferably limited tosubstantially one complete circle of relative movement by any suitablemeans such as stops which might co-act between the ring gears I2 and I3.For this purpose the large bearing eyelet II on which these ring gearsare mounted might be arranged to turn ilxedly with one of said gears andbe turnable relatively to the other gear only to an extent that islimited by the said stops arranged to act between the eyelet Illand thering gear which turns relative thereto. A fuller explanation of thedetails of construction and operation of these discs and their stoplimited relative movement is contained in my Patent No. 2,004,137 wherecorresponding parts are identified by corresponding reference numerals.

The ring gears I2 and I3 are manually adjusted respectively by separatespur gears 11 and 18, these spur gears being on respectively oppositesides of an apron-like extension 19 of the otherwise circular main frameplate I8 on which each o1' said spur gears is pivotally mounted. Saidspur gears carry respectively forwardly projecting operating spindles 80and 8I turnable by manuals in the form of finger knobs 82 and 83 wherebygears 11 and 18 may be rotated manually together or separately. A clicksuch as shown at 84 in Fig. 1 limits the permissible degree of backwardturning of each of gears 11 and 18 for the purpose of preventing makeand break of the circuit between contact wiper 52 and the conductivedisc 6I other than with a snap action.

The protective and dust proof enclosing structure which houses theclockwork assembly hereinbefore referred to includes a bezel ring 85holding a clock face crystal 86. A mat ring 81 borders an annular spacearound the edge of the clock dial 25 in which annular space time settingarcuate signal charts in the form of curved bands oi the contrastingdistinctive colors of discs 6I and 82 are visible as shown in Fig. l,thereby to indicate by the arcuate length and circular positions of saidcurved color bands the portions of the full cycle of time represented bythe complete circle of the clock face during which the clock controlledcircuit will remain made or will remain broken. Conventional clock facegraduations on the clock dial 25 may serve to measure and indicate thehours and fractions of hours represented by the relative and absolutepositioning of the contrasting visible arcuate signal charts determinedby the circular positioning of discs 6| and 82, but if preferred I mayrender the measurement and indication of elapsed time represented by theextent o1' these color bands even more readily and exactly discernibleby adding to the visible portion of discs and 62 themselves indiciaquantitatively expressing diierent time intervals as illustrated in thecase of one disc in Fig. 1 where the graduations 88 serve to measure andindicate the number of hours and fraction or hours represented bythearcuate extent of the exposed portion of disc 8|. Correspondinggraduations could of course be applied to the other disc. To accord withthe gear ratio of 1 to 2 indicated between the hour hand spindle I1 andthe contact wiper 52, I may graduate the mat ring or alternative clockface 81 to represent a division of the complete circle into 24 hoursarranging the markings to make evident that twelve oi' these hours arehours of the day, and that the other twelve are hours of the night. Insuch case the graduatlons on the clock dial 2l will be referred to onlyfor telling the time oi day and the graduations on the mat ring 81 willbe Areferred to for telling what time of day or night the automaticcircuit switching action will take place. Obviously I might addgraduations to the clock face 25 for 2li-hour divisions of a completecircle in place of placing such graduations on the mat ring 81.

As part oi an enclosing structure I may provide the dustproof protectivecasing I6 with a iiange portion 89 which may be clamped iirmly to themain frame plate I0 by the same nuts 98 and spacer studs 9| which holdthe bezel ring 85, the casing 46 being notched and slotted as indicatedin Fig. 2 to form a narrow opening into its int'erior just back of plateI0 to permit entrance thereto of the gear 18 for meshing respectivelywith ring gears I2 and I3. Studs 9| and thereby the entire appliance maybe held firmly and removably on any supporting structure such as theclosure panel 92, 93 or 96 by means of preferably three or more screws|88.

Studs 9| and nuts 98 are capable of supporting and holding firmlytogether with or without the presence of the enclosing'structurecomprising parts 46, 85 and 88, the partitions I0 and Il. My improvedclock controlled switch appliance comprises an integral structurewhether assembled as an exposed unit without protective cover 46 or as acompletely housed operative mechanism, and it likewise comprises anintegral structure together with all the above described protectiveparts. When thus applied as a unit it is adapted to be rigidly mountedat the rear of a sight aperture 9 against the rear surface of a thinmetal support wall or panel as 92, or against a thick wooden supportwall or panel as 98, in either of which cases the clock crystal 88 maylie substantially flush with the front tace of such wall or panel. Thelength of studs 9| may be chosen to this end and such wall or panel willcontain openings through which the time setting spindles 8| and 80project. Knobs such as 88 and 82 may be detachably secured respectivelyto spindles 8| and 89, these knobs being the only working parts requiredto be removed in mounting or dismounting the entire clock switch unitfrom the wall or panel of any appliance or machine to which the unit isapplied. It is further apparent that in some cases the knobs 82 and 83can be made so small in comparison with the openings for spindles and 8|that even these knobs could be withdrawn through said openings withoutrequiring their removal.

Illustrative of a useful application of the complete clock switch unitof Figs. 1 and 2, I show this unit in Fig. 3 mounted upon the insidesurface of a sheet metal door 98 hinged to a cabinet 91 by brackets 98and hinge pins 99, the cabinet 91 containing a remote control, orelectromagnetic, switch commonly termed a relay. The remote .controlswitch comprises an insulative'base |00 on which is mounted electricarc-bemmg shields |I| at the point where contact is made and brokenbetween a line terminal |02 and its corresponding load terminal |03 andsimultaneously between a second line terminal |04 and its correspondingload terminal |05, the action of this` contact making and breakingmechanism being effected by the rocker core |06 of an electromagneticcoil |01 mounted upon a common squared rocker shaft |09 to swingtherewith in unisonwith the contact arms |09 and ||0. The core |00 iswithdrawn from magnet coil |01 by gravity, or by suitable spring means(not shown) and upon energization of magnet coil |01 is drawn withinsame to rock the contact arms |09 and in unison to contact makingposition. Terminals for the magnet coil |01 are shown at and ||2,respectively, and the electrical connection of the three wires 69. 10and 95 to the supply line and to the magnet coil |01 will be clear from'Fig. 3. Here these three wires are shown as leaving the cover 4i of theclock switch unit through the insulative bushing ||3 and detachablysecured respectively to three binding posts on the insulative block I4to each of which binding posts are respectively secured individuallyinsulated wires of flexible nature which permit the opening and closingof the door 96 relative to cabinet 91. By the means just described, wire59 connects electrically to both the right line terminal |04 and themagnet coil terminal wire 10 connects electrically with the otherterminal ||2 of the magnet coil |01; and wire 95 connects to the leftline terminal |02. By these connections -the magnet coil |01 of theremote control switch is energized an'd de-energized by the circuitcontrolling action of contact wiper 52 in the clock operated switchunit, while the motor coil 33 of the timing movement is constantlyenergized through permanent connection to the line terminals |02 and |04of the electromagnetic switch. It will be understood that when thecabinet door 96 is closed the clock face dial 25 and time setting discs5| and 52, as well as the time setting kcontrols 82 and 03, are allaccessible or visible from the exterior of cabinet 91 in the mannershown in Figs. 1 and 2. There is room in the upper portion of cabinet 91to receive the clock switch unit when the door 95 is closed,

the flexible wires being suitably secured by clips ||5 at differentpoints properly to hold these wires from interference with any of theworking parts of the mechanism. From the foregoing description it willbe appreciated that it is a very easy matter to remove the clockoperated switch unit completely from-the cabinet of the remote controlswitch in the case of needed attention or repairs to the clock or theswitch unit. This can easily be done by inexperienced mechanics in thefield who without expert repair experience will thus be able to replacea defective time switch unit with a sparev or replacement unit that isin good operating condition without appreciable interruption of use ofthe relay.

As in some uses it is desirable to have the contact wiper 52 travel atthe same rate of speed, or in strict unison with, the hour hand 40 ofthe clock while in other uses it is preferred that contact wiper 52travel at half that speed thus consuming 24 hours in making onerevolution, economies of manufacture and commercial distribution can beeffected by providing a gearing arrangement for driving contact wiper 52which will be shiftable at will to produce either one of accesso theabove mentioned speeds. A peculiar requirement of such arrangement isthat the wiper 52 must always so rotate as to coincide with the positionof hour hand 4l at its point of circuit breaking action when the hourhand is at some Adefinite and predetermined point in its travel.

Usually this will be when the hour hand points to 12 where as is shownin Fig. 1, the cardinal "12 of a stationary 24-hour series ofgraduations coincides in its position on the circle with cardinal 12 onthe time telling clock face. In such case therefore, whether the wiper52 rotates in sychronism with thehour hand, or completes one revolutionto everytwo revolutions of the hour hand, it will always be necessarythat when the contact wiper 52 (or its operating tip which snaps fromone to the other of discs 5|, 52) is at exactly top center position inFig. l, the hour hand shall point exactly to twelve oclock, and nochange in this condition must be broughtabout through the act ofshifting the speed at which contact wiper 52 shall be impelled, sincethe same condition must obtain if the wiper 52 is to bc geared to travelat a speed equal to that of the hour hand or only half as fast.

With `these particular requirements in mind, I have shown in Fig. 5 amodification of the construction of the idler gears 59 and 60 wherein anidler spindle ||5 is given bearing of appreciable length in a bushingstructure ||1 which extends through the switch base I4 and is fastthereto. Spindle ||9 carries fixed pinion 59 at its forward end as inFig. 4 but at its rear end is provided with a shoulder I9, a roundportion ||9 of reduced diameter, and a rear squared terminus |20threaded internally from its rear end. A pinion |2| of the same size aspinion 59 may turn loosely on spindle H9, or be clamped to rotate ixedlytherewith. by means of a bushing |22 slidably fitted to the squaredterminus |20 of spindle ||6 and overhanging the same to receive thetightening thrust of the head of a screw |23 engaging the threaded holein the rear of spindle |16. Leaving screw |23 tight or loose will de-4r/ termine whether pinion |2| is fast or loose respectively in relationto spindle H0. Pinion |2| is in mesh with an additional gear |24 whichturns xedly with the hour hand spindle 41' and is of the same diameteras the contact wiper gear 54 so that when pinion |2| is fast to spindle||0 the contact wiper 52 will rotate at the same speed as an hour hand49. In this modiilcation I give the rear idler gear v60 (which issimllar'in size to the idler gear 60 of Fig. 4 and is in mesh with thesame hour spindle gear 58) a loose or tight connection on the clampbushing |22 depending on whether a clamp nut |24 is set up tightly orloosely on the threaded exterior of bushing |22 by means of which gear00 may be forced forward against the front shoulder on said bushing tobe made fast thereto. Obviously, the above described mechanism wouldlock and be inoperative if both the screw |23 and the clamp nut |24 aretightened at the same time, but ii'I one alone is tightened and if inshifting the gear ratio the other is tightened before the rst isloosened, no

relative movement will have taken place between the hour spindle 41' andthe contact wiper 52 as a consequence of having shifted the effectivedrive connection of contact wiper 52 from gear |2| to gear 5|. or viceversa. Accordingly it will be appreciated that if the clock hands areset to exactly twelve oclock when the shift in gear ratio is made. thewiper 52 will not be thrown out of accurate rotative relationship to theclock loutside the protective cover 48.

ll hands with respect to its performing circuit switching automaticaction at the true times of day or night indicated by the settings ofthe discs 8| and 62 against their designed scales of graduations.

The timing movement energized by the coil 33 may be a synchronous motorof the self starting type or of the non self starting type. In thelatter case, for convenience in restarting the motor should it stop fromcurrent interruption, I may employ a spinning device best shown in Fig.'I consisting of a starter spindle |25 journaled in the movement platesand carrying fixed to turn therewith between plates 28 and 21 a flangedmember |26 which carries secured in its flange and -disposed parallel toits axis, the starter pin |21 connected by the spring |28 to themovement post 29. The starter pin |21 as carried with the flanged member|26 swings in an arcuate opening in the movement plate 21 the ends ofwhich opening limit the swinging travel of pin |21 in both directions,the spring |28 normally stationing the pin |21 in contact with one endof said opening and out of contact with the armature gear |29. Onturning the spindle |25 clockwise as viewed in Fig. 8 to the limit ofmovement permitted by the travel of pin |21 in its arcuate slot, therear end of pin |21 isswept into engagement with teeth of the armaturegear |29 so that when suddenly released by the hand of the operator thepin |21 is snapped back to its normal or starting position thusimparting a spin to the armature gear |29 through the rapidity of thespring caused action. The speed thus imparted to armature gear |29 ispreferably as great as, or greater than, its normal running speed sothat the armature 32 may by this starting movement slow down into exactstep with its designed ratio of speed in relation to the oscillations ofalternating current in the coil 33.

In Figs. 2 and 3 1 show the starter spindle |35 manually operable by asimple crank handle |38 In Figs. 6, '1 and 8, I show the crank handle|30 replaced by an arm |30' carrying the pin I3I to be engaged by theforked end of a rocker lever |32 pivoted at I 33 to a bracket |34 whichis secured to the 'rear face of the protective cover 46. The bracket |34gives sliding bearing to a push rod |35 carrying a cone shaped actuator|36 at its rear end adapted to act upon the lower offset end of rockerlever |32 for displacing the latter when the actuator |36 is thrusttoward the rear, the broken lines in Fig. 8 indicating the positions towhich arm |30' and rocker lever |32 will thereby be movedagainst thetension of spring |21. Whereas the push rod |35 may extend to anyaccessible position for use by the operator of the clock switch unit, Ihave shown in Fig. 6 that it may extend forwardly through the shaft 80'or 8|, made hollow for this purpose, thereby to permit the operativeassociation of push rod |35 with either of the time setting knobs as83', the rod |35 terminating in a push button |31 forced yieldablyforward relative to knob 83 by the thrust of spring |38 whereby thestarting of the electric motor is reliably accomplished by pushing thepush button |31 inward and releasing it suddenly so that it will snapoutward.

Fig. 6 further shows a modified construction applicable to one or bothof the gears 11 and 18 which mesh with ring gears |2 and I3,respectively, for adjusting the times of circuit controling switchaction. In this modification the spindle 89 is made with a round portion|39 `lournaled in the frame plate III and flanked at each side of saidframe plate by squared portions III. On each of these squared portionsthere is carried a similar gear 11 securedAby a thrust nut I4I engagingthreaded portions of spindle 88'. Between the front gear 11 and theframe plate I0, a cupped spring washer |42 acts to thrust spindle 89 andall parts carried thereby, forwardly, there being a slight space topermit a little rearward movement of these parts against the tension ofwasher |42. Between the rear gear 11' and the frame plate I0 is a washer|43 of friction material affording yieldable resistance to the turningof the rear gear 11 with which it has considerable area of surfacecontact. This arrangement affords what in eect is a self-braking orself-staying action of each spindle 88 or 8| and consequently of ringgears I2 or I3. The frictional resistance of washer |43 is convenientlyannulled or overcome by the forces that would be imparted to knobs 82'or 83' by the hand of the user in the natural manner of operating same.Hence in this construction either of discs 8| or 62 will remainstationary while the other is shifted relative thereto without requiringsimultaneous grasping and manipulation of both time setting knobs inorder to prevent either disc 6I or 62 from turning with the other.

In Figs. 9 to 16, inclusive, I show a modification of certain parts ofmy improved clock switch unit, such modification as concerning the ringgears I2 and I3, enabling me to lead the current to and from the timecontrolled switching parts by current feeding or current take-oilbrushes wiping on conductive parts carried on said gears. As concerningthe circuit controlling discs 6I and 62, themselves, the modificationillustrated in Figs. 9 to i6 enables a universal time setting to be madein accordance with the principles disclosed in my Patent 2,004,137,where instead of only one conductive disc, there are two or morerelatively adjustable discs both of conductive material and completelyinsulated from each other in every possible relative position as Well asfrom the frame and from all metal operating mechanism of the entireclock switch unit except the contact wiper 52. This wiper in its circuitcontrolling rotation will be transferred with a snap action from one ofthese conductive discs to the other, and vice versa, being in no rotaryposition able to contact both of said discs at the same time. Thisenables the use of the time controlled switch for shifting currentautomatically from one circuit to a different circuit,

and back again at respectively predetermined times, instead of formerely making and breaking a single circuit.

In Figs. 9 and l0 .the ring gear |44 rotatively adjustable by gear 11(not shown in Figs. 9 and l0) is made of insulating material anddisposed against the front face of frame plate I0 as is the ring gear I2of Fig. 2. A similar ring gear |45 of insulative material and adjustableby gear 18 (not shown in Figs. 9 and l0) is disposed against the rearface of frame plate I0 in the manner of ring gear I3 of Fig. 2.Embedded, inlaid, or otherwise suitably secured to the front face ofring gear |44 is a collector ring |48 of conductive material on whichconstantly bears the conductive brush |41 which is in electrical contactwith binding post |48 mounted on and insulated from the main frame plateI0 and adapted to receive the wire |49 leading to one electric circuit.Correspondingly attached to the rear face of ring gear |45 is acollector ring Il.

accesos on which constantly bears the conductive brush |5| which is inelectrical contact with binding post |52 mounted on an insulated frommain frame plate I and adapted to receive the wire |55' leading to adifferent electric circuit.

Collector ring |45 carries the conductive pin |54 for propelling theprojection of a disc similar to disc 62 of Fig. 4 but made oi conductivematerial. This conductive disc is numbered 82' (see Fig. 11) and becauseof the uncertain electrical contact that would result from mechanicallooseness between pin |54 and the opening in projection 1|' engaged bysame, and because such mechanical looseness isdesirable for compensatingfor any inaccuracy in the exact concentric relationship of the partsthat turn in unison as well as to permit slight axial sliding movementbetween pin |54 and projection 1|', a flexible conductive strap orconnector |55 may be soldered or otherwise suitably secured to insuregood electrical connection between pin |54 and projection 1|' whileaccommodating slight relative movement therebetween. Collector ring Illcarries the conductive bracket 14' so disposed as to straddle and impelthe projection Il of conductive disc 6| in the same manner as insulativebracket 14 in Fig. 2, but because in Figs.

9 to 16 it is desired that good electrical contact shall exist betweenbracket 'il' and the disc projection 1I, a ilexible stra.: |55 may beemployed and attached for this purpose in the manner of the connector|55.

vTo maintain the discs and 62'of Figs. 12 and 11 always insulated fromeach other in every possible rotative relation. I may insulate thefront, or visible, face of disc 5| by enameling the same or in any othersuitable way such as by joining xedly to the said face of disc 6| a thindisc of insulation preferably of slightly larger diameter than disc 6|such as the disc |51 of Fig. 14 having the notch 1G beyond which in aforward direction, the stop lug '|5 may project. In a similar manner Imay enamel or otherwise insulate the front or visible face of disc 52'in Fig. 11 such as by cementing or otherwise securely fastening to saidface of disc 62 a conflgurati've disc of insulating material such as |59inFig. 13, same being of slightly larger diameter than disc 62' andcarrying the notch 'I5' to coact as a stop with the -lug .'15 on disc5|. which latter is kept from contact with the metal of disc 52' by alarger notch |5|| in the latter disc. Also to prevent projection v'i3from coming into electrical contact with projection 1|' when these twoprojections would otherwise engage and act as a limiting stop in theopposite direction of rela.

tive movement from that direction in which the relative movement ischeckedby lug 15 and the edge of notch 18', I may provide disc |59 withthe peripheral projection |6| in such relationship to projection as willoperate to this end.

In the relationship of the parts detailed in Figs. 11 to 14 that isindicated in Fig. 9, the contact wiper 52" in its clockwise rotativemovement as impelled by the time movement will snap from its :Sull lineposition to its broken line position in Fi". 15 thus shifting the flowof current supplied through line wire 10, from disc 6| to disc 52', thatis to say from the circuit lead wire |49 to the lead wire |53 of adiiferent circuit.

Likewise in the next circuit shifting action of wiper 52, the latterwill snap from its full line position to its broken line position inFig. 16, thus shifting the supply of current delivered by line wire 15,from disc 62' to disc 6|, that is to say,

from circuit lead wire |53 to circuit lead wire III. It is thus seen howthe modiiied clock switch oi' Figs. 9 to 16. inclusive, functions as aso-called double-throw switch instead of as an ordinary "On and Oii'switch. This doublethrow feature is commonly applicable to remotacontrol electric switches, gas. valves or other devices reciprocatedbetween two positions by the use of two magnets as indicated in Pig. 33of the drawings of my United States patent. Number 1,984,204, grantedDecember 11, 1934.

It will be noted from Fig. 10 how the take-oi! of current from thecommutator rings I" and enables me to dispense with a compound supportstructure such as the conductive bushing l5, insulative collar 20, andinsulative extension 23 of Fig. 4 and substitute therefor thesinglepiece insulative bushing |62 as a support for the clock face andfor the parts which rotate concentrically therewith. I may also dispensewith the hub eyelet 53 of Fig. 4 and arrange the discs 5| and 52 to bearrotatably on a simple insulative collar |63 between insulative washers|54 at their front and at their rear.` The retaining nut |55 havingthreaded engagement with the frontend of insulative bushing |52 (used inplace of the screw 24 of Fig. v4)may clamp the clock face or dial 25directly against the front end of insulative collar |53. The frictionspring 55 of Fig.`4 may also thus be omitted.

I claim: 1. A time telling electric circuit controlling applianceadapted to be detachably mounted as an exchangeable unit on a supportwall, proximate a sight aperture therein, embodying in combination witha clock face, clockwork including a time-of-day telling clock handcooperative with said clock face rotatable about an axis in position tobe observed through said sight aperture, en-

closing structure housing said clockwork, framewithin said enclosingstructure and containing a frame hole, a ring-like time setting devicebordering said frame hole and carried by said partition in a manner tobe rotatably adjustable about said axis while positioned to be observedthrough said sight `aperture,` and electric current switching mechanismcontrollably related to said clockwork and deriving its support fromsaid framework without the instrumentality of said enclosing structureincluding a contact member arranged to be settable adiustably aroundsaid axis by rotary movement of said time setting device.

2. A time telling electric circuit controlling appliance as defined inclaim 1, together with a second ring-like time setting device carried bythe said partition in a manner to be rotatably adjustable about the saidaxis relatively both to said partition and to the rst said ring-liketime setting device.

3. A time-telling electric circuit controlling appliance as defined inclaim 1, together with a second ring-like time setting device carried bythe said partition in a manner to be rotatably adjustabale about thesaid axis relatively both to 4. A time telling electric circuitcontrolling appliance as defined in claim 1, together with a secondring-like time setting device on the opposite side of the said partitionfrom the first said ring-like time setting device, and an eyeletshapedannulus shaped and arranged cooperatively with said time setting devicesand occupying the saidframe hole in said partition in a manner to affordaxially retentive internal rotary bearing support for both of saidring-like time setting devices.

5. A time telling electric circuit controlling appliance as defined inclaim 1, in which the said time setting device comprises a time settingring on one side of the said partition having spur gear teeth, togetherwith a time setting ring on the other side of said partition having spurgear teeth, and separate ring actuating pinions pivotally supported atrespectively opposite sides of said partition in mesh with ythe gearteeth of said time setting rings respectively.

6. A time telling electric circuit controlling appliance as defined inclaim 1, in which the said enclosing structure is mainly cylindrical andthe said partition comprises a flat plate having a circular areacoextensive with the compass of said enclosing structure and extendingradially in outboard relation therebeyond, and the said time settingdevice comprises a time setting ring on one side of said partition platehaving spur gear teeth, together with a ring actuating pinion pivotallysupported on the said side of said partition plate outside the compassof said enclosing structure in mesh with the gear teeth of said timeset- 51118 ring.

7. A time telling electric circuit controlling appliance adapted to bedetachably mounted as an exchangeable unit on a support wall proximate asight aperture therein, embodying in combination with a clock face, aclockwork including a time-of-day telling clock hand cooperative withsaid clock face rotatable about an axis in position to be observedthrough said sight aperture, enclosing structure housing said clockworkincluding a transparent protecive covering in front of said clock handregistering with said sight aperture, framework supporting saidclockwork witnoutthe instrumentality of said enclosing structureincluding a partition to which at least part of said enclosing structureis detachably joined equipped to derive full support from said wallwithout the instrumentality of said enclosing structure said partitionbeing directed crosswise of said axis within said enclosing structureand containing a frame hole, a ring-like time setting device borderingsaid frame hole and carried by said partition in a manner-to berotatably adjustable about said axis while positioned to be observedthrough said sight aperture, and electric current switching mechanismcontrollably related to said clockwork and deriving its support fromsaid framework without the instrumentality of said enclosing structureincluding a contact member arranged to be settable adjustably aroundsaid axis by rotary movement of said time setting device.

8. A time telling electric circuit controlling appliance as defined inclaim '7, in which the said enclosing structure comprises two cuppedsections joined in rim-to-rim relation, one of said sections includingthe said transparent protective covering.

9. A time telling electric circuit controlling appliance as defined inclaim 7, in which the said enclosing structure comprises two cuppedsections' joined in rim-to-rim relation, and the said partition has amarginal portion fixedly sandwiched between said cupped sections 10. Atime telling electric circuit controlling appliance as defined in claim7, in which the said enclosing structure comprises two cupped sectionsdisposed in rim-to-rim relation, each of said sections having a radiallyoutward directed flange at its rim, said rim flanges being fastenedseparably together, and means penetrating said rim flanges fordemountably attaching said enclosing structure to the said support wallat points bordering about the said sight aperture therein.

11. In a settable double-throw time switch for shifting current flowfrom one circuit to a difierent circuit the combination of a circuitousscale of time designating indicia, terminals of two electric circuits, afirst cross-split ring of composite conductive and non-conductive unitedmaterials having a front face of non-conductive material in registerwith said indicia and a rear face of conductive material electricallyconnected with one of said terminals, a second cross-split ring ofcomposite conductive and non-conductive united materials having a frontface of non-conductive material in register with said indicia and a rearface of conductive material electrically connected with the other ofsaid terminals, means rotatably supporting said rings so that at leastone ring may flex to a helical form and so that each ring may be rotatedthrough the split portion of the other ring thereby to dispose varyingextents of its circular lengths on respectively different sides of theother ring, and a rotatable electric distributor mounted to wipe againstthe rear faces of said rings sequentially for delivering current toeither of said circuit terminals.

i2. In a settable time switch the combination defined in claim l1,together with two setting rings of insulating material supported forrotary adjustive movement coaxially with the said crosssplit rings, eachof said setting rings carrying a circular conductive track electricallyand mechanically coupled to the said conductive material of a differentone of said cross-split rings, and a current conductive brush disposedto wipe against each of said conductive tracks.

13. In timing mechanism, the combination of, a clockworks, a stationaryclock face, a spindle driven by said clockworks, a clock hand carried bysaid spindle to sweep in front of said clock face, indicia on said clockface including an index mark, electric switch controlling mechanismincluding a rotor coaxial with said spindle, and a variable speedtransmission comprising two sets of constantly meshing gears connectedto impart alternatively to said rotor motion derived from saidclockworks,

14. In timing mechanism, the combination defined in claim 13, in whichthe said variable speed transmission includes two pairs of change gearswith the gears of each of said pairs constantly in mesh, and means toclutch one of the gears of either of said pairs to the said clockworkand simultaneously to declutch one of the gears of the other of saidpairs from the said rotor in a manner to vary the speed ratio betweensaid elockworks and rotor without displacing said rotor from itsrelation to said index mark.

l5. In a multiple scale time indicating mechanism, a time movement, twoscales of time indicia arranged in concentric circles and designatingrespectively different intervals of time corresponding to equalsegmental portions of said concentric circles, at least one signaldevice movable in a path to register with both of said scales of istructed and arranged to be settable in accordance with the position ofsaid signal along said path and a movable part cooperative with saidstationary part, together with speed changing mechanism comprising twosets of constantly meshing gears connected to transmit impelling poweralternatively from said movement to said movable part of said switchcontrolling mechanism.

16. In a combined clock and time switch unit, the combination of,electric switch control mechanism, clockwork objectively associated withsaid mechanism Aincluding motor driven time telling hands, separatelymovable handles connected respectively to actuate said mechanism andsaid clockwork, and coaxial spindles separately and independentlymovable operatively connecting said handles to said mechanism and saidclockwork respectively at least one of said spindles being movable in anaxial direction for actuating said clockwork.

17. The combination of a switch cabinet, a door having a sight aperturehinged to said cabinet in a manner to swing to a position completingclosure for the interiorof the cabinet, an electromagnetic circuitcontroller of relatively high electrical capacity within Isaid cabinetincluding a contact actuating solenoid, a time switch unit of relativelylow electrical capacity carried detachably by said door on the cabinetside of said sight aperture and registering with the latter, andelectrical conductors connecting said solenoid to said time switch unitconstructed and arranged to permit said door to swing to and away fromits said closure completing position.

18. In a settable time switch, the combination of, a scale of circularlyarranged time designating indicia, a first cross-split ring, a secondcross'- split ring, means rotatably supporting said rings so thatatleast one ring may flex to a helical form and so that ring may berotated adjustably through the split portion of the other ring, electricswitch controlling means including a time driven element and anadjustably settable stationary member cooperative therewith, signalmeans registering with said indicia and adjustably settable inaccordance with various stationary positions of said member, separatemanuals connected respectively to rotate said rings adjustably, andyieldable brake means automatically operative to resist the rotaryadjustment of at least one of said rings thereby to retain the said onering while the other ring is rotated adjustably by its said manual.

19. In a concentric clockwork and time switch mechanism, a frame platefor supporting both clockwork and time switch mechanism, a hollow postperpendicular to and rigid with said plate, a threaded tube ofinsulating material xedly carried at the free end of said posts, a nuthaving threaded engagement with said tube and insulated thereby fromvsaid post. a clock hand, a clock face removably retained on said tubeby said nut, a clock spindle extending through both said post and saidtube and journaled in said nut carrying a clock hand in front of saidclock face, and electrically conductive current switching parts betweensaid frame plate and said clock 18 face rotatably supported in part bysaid post and in part by said tube.

20. A time telling electric circuit controlling appliance adapted to bedetachably mounted as an exchangeable unit on a support wall proximate asight aperture therein, embodying in combination with a clock face,clockwork including a time-of-day telling clock hand cooperative withsaid clock face rotatable about an axis in position to be observedthrough said' sight aperture, enclosing structure housing saidclockwork, framework including a main partition to which at least parto1' said enclosing structure is detachably joined equipped to derivefull support from said wall without the instrumentality of saidenclosing structure said partition being directed crosswise of said axiswithin said enclosing structure and containing a frame hole, anauxiliary partition supporting said clockwork also extending crosswisesaid axis deriving full support from said main partition without theinstrumentality of said enclosing structure, a hollow bearing postconcentric with said axis xed on and projecting from said auxiliarypartition and carrying said clock face, spindle connections extendingthrough said hollow post and through said auxiliary partition impellablyconnected to said clock hand, a ring-like time setting device borderingsaid frame hole and carried by said main partition in a manner to berotatably adjustable about said axis while positioned to be observedthrough said sight aperture, and electric current switching mechanismcontrollably related to said clockwork deriving its support from saidbearing post without the instrumentality of said enclosing structureincluding a contact member arranged to be adjustably settable aroundsaid axis by rotary movement of said time setting device.

21. In a combined clock and time switch unit completely settable by theuse of a single hand of the operator to perform at least two automaticswitch actions at selected different times of day, the combination of, aframework, a circuitous scale of time-of-day markings stationed inrelation to said framework, a first arcuate signal chart mounted forrotary adjustive movement relatively to said framework through a rangeof various settings in visible time signaling relation to said scale, asecond arcuate signal chart mounted concentrically with said rst chartfor rotary adjustive movement through a range of various settingsrelatively to both said first chart and said frame work in cooperativetime-signaling register therewith, switch action controlling elementsoperably connected to said charts respectively in a manner to bestationed variously in different switch timing positions with respect toeach other and to said framework in accordance with rotary settings ofsaid charts, separate manuals connected to adjust said chartsselectively to their said settings, and a brake arranged cooperativelywith at least one of said charts and its said manual in a manner toanchor `the same yieldably in relation to said frame with sumcient forceto hold said one of said charts and its said connected switchcontrolling element motionless during rotary adjustive movement oi' theother said chart within its said range.

22. In a combined clock and time switch unit I completely settable bythe use of a single hand of the operator to perform at least twoautomatic switch actions at selected different times oiday, thecombination defined in claim 21, in-which the said brake comprises aspring deriving thrust from the said frame plate and exerting africa,sos,soo

tional thrust on at least one of the said manuals.

23. In a combined clock and time switch unit completely settable by theuse of a single hand of the operator to perform at least two automaticswitch actions at selected different times of day, the combinationdenned in claim 21l together with a set of meshing gears turnablysupported by the said frame plate, one of said gears being connected toimpart adjustive rotary movement to one of the said signal charts andthe other of said gears being connected to be impelled by one of thesaid manuals, the said brake cornprising a spring under compressionbetween said frame plate and said manual impelled gear.

24. 'In a combined clock and time switch unit completely settablewithout regard to sequence by the use of a single hand of the operatorto perform at least two automatic switch actions at selected differenttimes of day, the combination of a framework, a circuitous scale oftimeof day markings stationed in relation to said framework, at leasttwo arcuate signal charts one being mounted for rotary adjustivemovement through a range of various settings relatively to the other andto said framework in visible time signaling relation to said scale, andthe other chart being mounted concentrically with said first chart forrotary adjustive movement through a range of various settings relativelyto both said rst chart and said frame work in cooperative time-signalingregister therewith, switch action controlling elements operablyconnected to said charts respectively in 'a manner to be stationedvariously in different switch timing positions with respect to eachother and to said framework in accordance with rotary settings of saidcharts, separate manuals connected to adjust said charts selectively totheir said settings, and a brake arranged cooperatively with each ofsaid charts and its said manual in a manner to anchor the same yieldablyin relation to said frame with sufficient force to hold either of saidcharts and its said connected switch con- 20 trolling element motionlessduring rotary adjustive movement o! the other said chart within its saidrange.

25. In an automatically acting time switch, the combination of a clockhand turnable about an axis of rotation to tell time of day, a frameplate extending transversely of said axis of rotation, a closure panelin front of said frame plate spaced therefrom, a sight window in saidclosure panel through which said clock hand is visible, concentricarcuate time signaling charts independently movable for cooperativerotary adjustment in mutual register so that one of said charts concealsand exposes various selective portions of the other of said charts, saidcharts deriving support from said frame plate and being visible throughsaid window, sets of gears deriving support from said frame plate eachof said sets of gears being connected to cause independent rotaryadjustment of a different one of said charts, at least one of said setsof gears being located between said frame plate and said closure paneland concealed by the latter, and manual controls operatively connectedrespectively to gears of said sets and extending through said closurepanel to be accessible for time setting manipulation at the front of thelatter.

RAYMOND D. SMITH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,180,420 Parker Apr, 25, 19161,563,072 Brenneman Nov. 24, 1925 1,633,870 Potter June 28, 19272,004,137 Smith June 11, 1935 2,032,774 Smith Mar. 3, 1936 2,124,045Swensen July 19, 1938 2,249,237 Fulton July 15, 1941 2,288,539 MorrisonJune 30, 1942

